85 



Laving afterwards discovered some inac- 

 curacy in the process, the result was never 

 noticed. 



To meet the experiment in a satisfac- 

 tory manner. Fig. 4, on Plate II, is in- 

 troduced. The engraving is made di- 

 rectly from the end of a Larch board, 

 which has been some years in my posses- 

 sion. A shews the core of the wood, 

 and the origin of a branch : B the part 

 which was the outside of the tree, when 

 the branch died, and likewise, some re- 

 mains of the woody part of it. The dark 

 part, C to C, is the cavity made in the 

 wood, by inclosing the branch with the 

 bark upon it, after it was dead ; part of 

 the latter still remaining in it, as the saw 

 has accidentally gone exactly in the line 

 between that and the wood. If we count 

 the annual circles of the wood, or curved 

 lines, we find it remained in that state, 

 at least thirty two years upon the tree; 

 but how much longer we cannot say, as 



